﻿/**
 * @license Copyright (c) 2003-2014, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or http://ckeditor.com/license
 */

(function () {
    function protectFormStyles(formElement) {
        if (!formElement || formElement.type != CKEDITOR.NODE_ELEMENT || formElement.getName() != 'form')
            return [];

        var hijackRecord = [],
            hijackNames = ['style', 'className'];
        for (var i = 0; i < hijackNames.length; i++) {
            var name = hijackNames[i];
            var $node = formElement.$.elements.namedItem(name);
            if ($node) {
                var hijackNode = new CKEDITOR.dom.element($node);
                hijackRecord.push([hijackNode, hijackNode.nextSibling]);
                hijackNode.remove();
            }
        }

        return hijackRecord;
    }

    function restoreFormStyles(formElement, hijackRecord) {
        if (!formElement || formElement.type != CKEDITOR.NODE_ELEMENT || formElement.getName() != 'form')
            return;

        if (hijackRecord.length > 0) {
            for (var i = hijackRecord.length - 1; i >= 0; i--) {
                var node = hijackRecord[i][0];
                var sibling = hijackRecord[i][1];
                if (sibling)
                    node.insertBefore(sibling);
                else
                    node.appendTo(formElement);
            }
        }
    }

    function saveStyles(element, isInsideEditor) {
        var data = protectFormStyles(element);
        var retval = {};

        var $element = element.$;

        if (!isInsideEditor) {
            retval['class'] = $element.className || '';
            $element.className = '';
        }

        retval.inline = $element.style.cssText || '';
        if (!isInsideEditor) // Reset any external styles that might interfere. (#2474)
            $element.style.cssText = 'position: static; overflow: visible';

        restoreFormStyles(data);
        return retval;
    }

    function restoreStyles(element, savedStyles) {
        var data = protectFormStyles(element);
        var $element = element.$;
        if ('class' in savedStyles)
            $element.className = savedStyles['class'];
        if ('inline' in savedStyles)
            $element.style.cssText = savedStyles.inline;
        restoreFormStyles(data);
    }

    function refreshCursor(editor) {
        if (editor.editable().isInline())
            return;

        // Refresh all editor instances on the page (#5724).
        var all = CKEDITOR.instances;
        for (var i in all) {
            var one = all[i];
            if (one.mode == 'wysiwyg' && !one.readOnly) {
                var body = one.document.getBody();
                // Refresh 'contentEditable' otherwise
                // DOM lifting breaks design mode. (#5560)
                body.setAttribute('contentEditable', false);
                body.setAttribute('contentEditable', true);
            }
        }

        if (editor.editable().hasFocus) {
            editor.toolbox.focus();
            editor.focus();
        }
    }

    CKEDITOR.plugins.add('maximize', {
        lang: 'af,ar,bg,bn,bs,ca,cs,cy,da,de,el,en,en-au,en-ca,en-gb,eo,es,et,eu,fa,fi,fo,fr,fr-ca,gl,gu,he,hi,hr,hu,id,is,it,ja,ka,km,ko,ku,lt,lv,mk,mn,ms,nb,nl,no,pl,pt,pt-br,ro,ru,si,sk,sl,sq,sr,sr-latn,sv,th,tr,tt,ug,uk,vi,zh,zh-cn', // %REMOVE_LINE_CORE%
        icons: 'maximize', // %REMOVE_LINE_CORE%
        hidpi: true, // %REMOVE_LINE_CORE%
        init: function (editor) {
            // Maximize plugin isn't available in inline mode yet.
            if (editor.elementMode == CKEDITOR.ELEMENT_MODE_INLINE)
                return;

            var lang = editor.lang;
            var mainDocument = CKEDITOR.document,
                mainWindow = mainDocument.getWindow();

            // Saved selection and scroll position for the editing area.
            var savedSelection, savedScroll;

            // Saved scroll position for the outer window.
            var outerScroll;

            // Saved resize handler function.
            function resizeHandler() {
                var viewPaneSize = mainWindow.getViewPaneSize();
                editor.resize(viewPaneSize.width, viewPaneSize.height, null, true);
            }

            // Retain state after mode switches.
            var savedState = CKEDITOR.TRISTATE_OFF;

            editor.addCommand('maximize', {
                // Disabled on iOS (#8307).
                modes: {wysiwyg: !CKEDITOR.env.iOS, source: !CKEDITOR.env.iOS},
                readOnly: 1,
                editorFocus: false,
                exec: function () {
                    var container = editor.container.getChild(1);
                    var contents = editor.ui.space('contents');

                    // Save current selection and scroll position in editing area.
                    if (editor.mode == 'wysiwyg') {
                        var selection = editor.getSelection();
                        savedSelection = selection && selection.getRanges();
                        savedScroll = mainWindow.getScrollPosition();
                    } else {
                        var $textarea = editor.editable().$;
                        savedSelection = !CKEDITOR.env.ie && [$textarea.selectionStart, $textarea.selectionEnd];
                        savedScroll = [$textarea.scrollLeft, $textarea.scrollTop];
                    }

                    if (this.state == CKEDITOR.TRISTATE_OFF) // Go fullscreen if the state is off.
                    {
                        // Add event handler for resizing.
                        mainWindow.on('resize', resizeHandler);

                        // Save the scroll bar position.
                        outerScroll = mainWindow.getScrollPosition();

                        // Save and reset the styles for the entire node tree.
                        var currentNode = editor.container;
                        while ((currentNode = currentNode.getParent())) {
                            currentNode.setCustomData('maximize_saved_styles', saveStyles(currentNode));
                            // Show under floatpanels (-1) and context menu (-2).
                            currentNode.setStyle('z-index', editor.config.baseFloatZIndex - 5);
                        }
                        contents.setCustomData('maximize_saved_styles', saveStyles(contents, true));
                        container.setCustomData('maximize_saved_styles', saveStyles(container, true));

                        // Hide scroll bars.
                        var styles = {
                            overflow: CKEDITOR.env.webkit ? '' : 'hidden', // #6896
                            width: 0,
                            height: 0
                        };

                        mainDocument.getDocumentElement().setStyles(styles);
                        !CKEDITOR.env.gecko && mainDocument.getDocumentElement().setStyle('position', 'fixed');
                        !(CKEDITOR.env.gecko && CKEDITOR.env.quirks) && mainDocument.getBody().setStyles(styles);

                        // Scroll to the top left (IE needs some time for it - #4923).
                        CKEDITOR.env.ie ? setTimeout(function () {
                            mainWindow.$.scrollTo(0, 0);
                        }, 0) : mainWindow.$.scrollTo(0, 0);

                        // Resize and move to top left.
                        // Special treatment for FF Quirks (#7284)
                        container.setStyle('position', CKEDITOR.env.gecko && CKEDITOR.env.quirks ? 'fixed' : 'absolute');
                        container.$.offsetLeft; // SAFARI BUG: See #2066.
                        container.setStyles({
                            // Show under floatpanels (-1) and context menu (-2).
                            'z-index': editor.config.baseFloatZIndex - 5,
                            left: '0px',
                            top: '0px'
                        });

                        // Add cke_maximized class before resize handle since that will change things sizes (#5580)
                        container.addClass('cke_maximized');

                        resizeHandler();

                        // Still not top left? Fix it. (Bug #174)
                        var offset = container.getDocumentPosition();
                        container.setStyles({
                            left: (-1 * offset.x) + 'px',
                            top: (-1 * offset.y) + 'px'
                        });

                        // Fixing positioning editor chrome in Firefox break design mode. (#5149)
                        CKEDITOR.env.gecko && refreshCursor(editor);

                    } else if (this.state == CKEDITOR.TRISTATE_ON) // Restore from fullscreen if the state is on.
                    {
                        // Remove event handler for resizing.
                        mainWindow.removeListener('resize', resizeHandler);

                        // Restore CSS styles for the entire node tree.
                        var editorElements = [contents, container];
                        for (var i = 0; i < editorElements.length; i++) {
                            restoreStyles(editorElements[i], editorElements[i].getCustomData('maximize_saved_styles'));
                            editorElements[i].removeCustomData('maximize_saved_styles');
                        }

                        currentNode = editor.container;
                        while ((currentNode = currentNode.getParent())) {
                            restoreStyles(currentNode, currentNode.getCustomData('maximize_saved_styles'));
                            currentNode.removeCustomData('maximize_saved_styles');
                        }

                        // Restore the window scroll position.
                        CKEDITOR.env.ie ? setTimeout(function () {
                            mainWindow.$.scrollTo(outerScroll.x, outerScroll.y);
                        }, 0) : mainWindow.$.scrollTo(outerScroll.x, outerScroll.y);

                        // Remove cke_maximized class.
                        container.removeClass('cke_maximized');

                        // Webkit requires a re-layout on editor chrome. (#6695)
                        if (CKEDITOR.env.webkit) {
                            container.setStyle('display', 'inline');
                            setTimeout(function () {
                                container.setStyle('display', 'block');
                            }, 0);
                        }

                        // Emit a resize event, because this time the size is modified in
                        // restoreStyles.
                        editor.fire('resize');
                    }

                    this.toggleState();

                    // Toggle button label.
                    var button = this.uiItems[0];
                    // Only try to change the button if it exists (#6166)
                    if (button) {
                        var label = (this.state == CKEDITOR.TRISTATE_OFF) ? lang.maximize.maximize : lang.maximize.minimize;
                        var buttonNode = CKEDITOR.document.getById(button._.id);
                        buttonNode.getChild(1).setHtml(label);
                        buttonNode.setAttribute('title', label);
                        buttonNode.setAttribute('href', 'javascript:void("' + label + '");');
                    }

                    // Restore selection and scroll position in editing area.
                    if (editor.mode == 'wysiwyg') {
                        if (savedSelection) {
                            // Fixing positioning editor chrome in Firefox break design mode. (#5149)
                            CKEDITOR.env.gecko && refreshCursor(editor);

                            editor.getSelection().selectRanges(savedSelection);
                            var element = editor.getSelection().getStartElement();
                            element && element.scrollIntoView(true);
                        } else
                            mainWindow.$.scrollTo(savedScroll.x, savedScroll.y);
                    } else {
                        if (savedSelection) {
                            $textarea.selectionStart = savedSelection[0];
                            $textarea.selectionEnd = savedSelection[1];
                        }
                        $textarea.scrollLeft = savedScroll[0];
                        $textarea.scrollTop = savedScroll[1];
                    }

                    savedSelection = savedScroll = null;
                    savedState = this.state;

                    editor.fire('maximize', this.state);
                },
                canUndo: false
            });

            editor.ui.addButton && editor.ui.addButton('Maximize', {
                label: lang.maximize.maximize,
                command: 'maximize',
                toolbar: 'tools,10'
            });

            // Restore the command state after mode change, unless it has been changed to disabled (#6467)
            editor.on('mode', function () {
                var command = editor.getCommand('maximize');
                command.setState(command.state == CKEDITOR.TRISTATE_DISABLED ? CKEDITOR.TRISTATE_DISABLED : savedState);
            }, null, null, 100);
        }
    });
})();

/**
 * Event fired when the maximize command is called.
 * It also indicates whether an editor is maximized or not.
 *
 * @event maximize
 * @member CKEDITOR.editor
 * @param {CKEDITOR.editor} editor This editor instance.
 * @param {Number} data Current state of the command. See {@link CKEDITOR#TRISTATE_ON} and {@link CKEDITOR#TRISTATE_OFF}.
 */
